Drill mounting



Patented et. 30, 1923..

narran j sraras FRANKLIN B. SPRY, OF IELYMOUTH,` PENNSYLVANIA. i

DRILL MOUNTING.

'j I Application* led August 21, 1922. Serial No. 583,320.l

To all whom it may concern:

Be it known that I, FRANKLIN B. SPRY, a citizen of the United States, residing at Plymouth, in the county of VLuzerneand State of Pennsylvania, have invented new and useful improvements in Drill Mountings, o f which the following is a specification. l j

This invention relates to drill mountings, particularly adapted for coal drills, and the primary object of the invention is to provide a simple frame structure over which the motor carrying the drill bit is longitudinally adjustable by manually controlled means to'regulate the penetration `of the drill bit relatively to a hard or soft substance or strata encountered during the drilling operation without requiring the substitution and use of feeding bars or screws i having different threads. A further object of the invention is to provide a drill mounting havin a feeding thread bar or screw separable -eed nut formed with threads only at the lower portion thereof and connected to a motor carrying and operating the drill bit, to permit full disengagement of said nut from the feeding bar or screw for quickreturn of the motor and bit to starting position by a simple manipulation; "A still further objectof the invention is to provide a ydrill mountingwith a driving bar or holding wedgeand with adjustable and foldable legs or supporting means which respectively allow adjustment of the ,drill bit and motor at any desired angle and` elevation and also permit the partsofthe mounting to be collapsed orreduced to compactform for ready transportation by one manto jand from and about different parts of a mine or other place.` y Y With these and other objects and advantages in view,;the inventionconsists y.in the construction and arrangement of the several parts which will be more fully hereinafter described and claimed. In 4the drawings Fig.`1 is a side elevation of the improved drill mounting and drill accessories shown applied in working position; f

Fig. 2 is a top plan view of the impro-ved drill mounting and drill accessories with the legs illustrated as folded and the parts as a whole reduced to compact form;l

Fig. 3 is a sectional perspective view of wedge; and

the forward extremity ofv thev improved mounting and the driving bar or holding y Fig. 4 is a transverse vertical section on the linea-#1, Fig. 1, showing parts of the mounting' broken away.

i The improved mounting comprises bars or guide rods 5 and 6 secured at their ends to cross heads 7 and 8 of special form. Each cross head has upwardly and outwardly inclined arms 9 in the terminals of which the guiderods 5 and 6 are secured. The arms 9 are continuous with depending bodies 10 and 11, the body 10 of the cross bead 7 being practically semicircular and having an opening 12 therethrough, and the body 11' of the cross head 8 being essentially rectangular and depending below the body 10 andhaving a right angular foot 13 with an opening 14 therethrough. The body 11 of the cross head 8 also has an opening `15 therethroughv adjacent to the juncture of the arms 9 with the body. T he opposite terminals of the arms 9 of the cross head 7 are directed forwardly to servey asjright angular supports 16 inrwhich leg sockets 17 are swiveled, each of the said sockets having a Vtransversely extending opening 18 therethrough intersected `by a longitudinal i screw-threaded opening 19 i to `receive a clamping screw 2O 'provided with a small clamping bar 21 which is loosely movable through the head 22 of the said screw. 'In' the openings 18 ofthe swiveled sockets 17 reversible legs 23 are adjustably mounted, the said legs having their opposite ends`24pointed so that either end `of each leg may be engaged with the supporting bed i of amineor'- other base means over ywhich the improved drill mounting and drill accesseries may be disposed. They legs 23 are freely slidable throughrthe openings 18 kin the sockets 17 and may be clamped and held fixed at different projecting lengths from their sockets bythe screws 20.

wires 26 adapted to be connected to a suitable source of current generation. The motor 25 has opposite pairs of apertured guide projections v27 through which the guide rods 5 vand 6 extend, these projectionsjbeing sepa rated by an open space 28 to reduce the friction between the said projections and the guide rods during the shifting movement of the motor 25 in opposite directions. Below the motor 25 a feeding threaded bar or screw rod 29 is swiveled in the openings 12 and l5 of the bodies l and 1l of the respective heads 7 and 8. The rear end of the vbar or rod 29 is reduced and projects rearwardly from the cross head 7, as at 30, and is provided with a crank handle 3l by means of which the said bar or rod may be manually rotated to control the feed of the motor2`5 longitudinally on the guide rods 5 and 6. The motor shaft is provided at its forward end with a tool holding socket and clamp'32 adapted to removably receive the shank 33 of a drill bit 34 which has free movement centrally between the arms 9 of the front cross head 8.

The casing or frame of the motor has a central depending extension 35 at the bottom thereof, the said extension forming part of the nut for engaging the threaded bar or screw rod 29, and for this purpose this extension is formed with a semicircular smooth channel 36, as clearly shown by Fig.V 4. At

one side ofthe centre of the extension 35 a movable nut member 37 is pivoted and has a semicircular threaded channel or groove 38, the bottom ofthe pivoted nut member 37 adjacent to the inner side edge thereof having an inclined catch enlargement 39 for engagement by an angular catch projection 40 ,at the Vinner portion'of the lower extremity of a catch 4l pivoted to the extension 3l at a point opposite to the attachment thereto of the pivoted nut member 37. The catch 4l has a lower outwardly projecting gripping extension 42 by which it may be easily operated to effect an engagement and disengagement thereof relatively to the pivoted nut member 37.

Depending from the angular foot V13, forming part of or secured to the body 11 of the front cross head 8, is a pin Vor post 43- secured at its upper end in the opening 14 of the said foot, and having the lower end screw-threaded, as at 44, to receive a nut 45.

This pin or post 43 is provided for attachment to the improved mounting of a driving bar or holding wedge 48 which has its front extremity 46 tapered and polygonal in con tour n cross section. The rear extremity of this driving bar or holding wedge is-formed with an elongated oval opening 47 therethrough to receive the pin 0r post 43, and when the nut 45 is applied to the lower screw-threaded extremity 44 of the pin or post the driving bar or holding wedge will have looseassociation with the pin or post to permit the remaining portion of the drill mounting and drill accessories carried by the mounting to be adjusted at any angle desired to drill. It will be seen that the elongated form of the opening 47 of the driving bar or holding wedge 48 permits the pin or post 43 to assume different angular positions therein without displacement and resetting of the said bar or wedge. The elongated opening or slot 47 in the rear extremity of the driving bar or holding wedge 48 also permits the said bar or wedge to be driven into the wall of material to be drilled, to tighten the same during the time that it is associated with the pin or post 43 without in the least jarring'or injuring the frame or the drill accessories carried thereby, and furthermore, the angularfootl3 is fixed to the front portion of the body ll, or the front cross head 8, and the pin or post 43 is immovably secured to the lower front extremity of the said foot and the position of the pin is never varied relatively to the foot.

In applying the improved drill mounting and drill accessories for operation, a starting opening yis formed in the coal vein or part of the mine wall adjacent Vto the vein,

or in other material, by means of the drill bit, and the driving bar or holding wedge 48 is then driven into said opening and is permanently secured' in View of the polygonal cross sectional contour of the front'tapered extremity thereof. The remaining part of the mounting and drill accessories including the motor 25 Vand drill bit 34 may then be set horizontally or at any angle desired by adjusting the legs 23 and fixingthe adjustmentY of said legs in the sockets 17. In starting the drilling operation the motor 25 carrying the drill bit 34 will be drawn rearwardly the required distance by first de taching the latch 4lvfrom the pivoted nut member 37 and thereby separating the threaded channel Aer groove 38 from the threads of the bar or rod 29. After the motor has been drawn back manually the required distance on the guide rods 5 and 6, and which movement will be readily permitted in view of the fact that the channel or groove 36 is not threaded, the pivoted nut member 37 is then turnedup in a position to cause the threaded channel or groove 38 thereof to iit over the threaded bar or rod' 29, the nut member being secured in this position by causing the latch 4l to engage the same. The motor25 is then started by'turning on the current theretoand the drill bit 34 is given a penetrative operation by manual adjustment or rotation of the bar or rod 29 through the crank handle31. If, during the course of penetration of the drill bit 34 over the coal vein or other substance drilled, a hard orvery soft substance is engaged, the operator may regulate the rapidity of penetration of the drill bit by decreasingzor increasing the forward feed thereof, or regulate the degree of rotation of the threaded bar or rod 29 in accordance with the character of the hard or soft substance encountered. During the drilling operationy the mounting will beheldl up in position by the driving bar ory holding wedge 48, and as hereinbefore intimated the improved mounting as a whole together with the motor 25 and drill bit 34 may be adjusted at diil'erent angles while the driving bar or holding wedge is retained in the position in which it was originally applied. TvVhen it is desired to transport or move the improved drill mounting and motor 25 and drill bit 34 from one point to another for resetting or reapplioation thereof, the driving bar or holding wedge 48 is withdrawn from its applied position and the legs 23 folded along the opposite sides of the mounting as shown by Fig. 2 to reduce the entire improved structure to compact form, and in this reduced arrangement the complete device may be readily transported by one man and reset with Vfacility.

The improved drill mounting and drill accessories are of comparatively light weight but at the same time are strong and'durable. By using a hand feed of the character specified it is possible to drill materials which could not be drilled with a positive feed and' by the use of a feeding bar and open box such as is now commonly used. Moreover, by having the feeding bar or screw rod 29 under manual control and regulable as hereinbefore specified, the drill is rendered capable of drilling both hard and soft material without the use and substitution of different thread bars or feeding screw rods.

It will be understood that changes in the proportions and dimensions and minor details of construction of the improved drill mounting may be adopted without departi ing from the principle of the invention.

What is claimed as new is:

A drill mounting of the class specified, comprising a frame having end cross heads each provided' with upwardly and outwardly inclined arms and a depending body, guide rods secured in the upper divergent terminals of the inclined arms, the depending body of the front cross head continuing into a downward projection terminating in a right-angular foot having a forwardly projecting horizontal member with a depending pin rigidly heldtherein, a mo-tor carrying drill accessories freely slid'able on the ide rods, a hand operated k'screw extending through the openings of the depending boss of the cross heads, the `lower portion of the motor being provided with means to separably engage the said screw, vertically and laterally adjustable legs associated with `the rear cross head, and a wedge tapered at its front extremity for driving the same into the material to be drilled, the rear extremity of the wedge having an elongated opening extending vertically therethrough for loose attachment to the pin depending from the foot and permitting the said pin to move backwardly and Jforwardly and also to assume different angular positions in said elongated opening in therear extremity of the wedge without ydisplacing or resetting the latter.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

FRANKLIN B. SPRY.

Witnesses:

A. K. DnWrrr, F. J. MURPHY. 

